Electric-lamp regulator.



No. 857,404. PATENTED JUNE 18, 1907.

E JOHNSON. ELECTRIC LAMP REGULATOR.

APPLICATION FILED -TAN.25,1907.

UNITED STATES PATENT orrion.

Specification of Letters Patent.

Patented June 18 1967.

Ap li ation fil d January 25,1907.- Serial No. 354,119,

T a/ZZ whmn it Duty concern.-

. Be it known that I, EMERY JOHNSON, a citizen of the United States, residing at Newberg, in the county of Yamhill and State of Oregon, have invented" a certain new and usefulElectric-Lamp Regulator, of which the following is a specification, reference being had therein to the accompanying drawing.

. This invention relates toelectric lamp regulators and the object of the invention is to provide an attachment for electric lamps adapted to be connected to an ordinary lamp socket in place of the usual lamp and to support and supply the current to the lamp itself,

the said regulating attachment embodying" novel means whereby the current fed to the lam maybe regulated to produce in the lamp.

an i luminating candle degree. With the above and other objects in View power of any desired the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts, herein fully described, illustrated and claimed.

In the accompanying drawings z- Figure 1 is a diametric'al section though a regulator attachment embodying the present invention. Fig. 2 is a plan View of the regulator, and Fig. 3 is a dlagrammatic view of the circuits.

The attachment comprises a frame or spool of non-conducting material and said framelors ool consists oloppositely arranged plates or eads of disk form, shown at 1 and 2, spaced apart a suitable distancev to admit the resistance coils hereinafter referred to,-

and' connected by a central and preferably cylindrical core 3, the frame thus resembling an ordinary reel or spool with relatively large heads; j

Fastenedto one of the frame pieces 01' heads 1 is a screw threaded metal connection 4 adapted to screw into the ordinary lamp v thelamp.

socket, while fastened to the other frame piece or head 2'is a corresponding screw threaded metal connection 5 adapted to receive the threaded end piece of the usual lamp, the device thus forming an attachment which is interposed between a lamp and lamp socket such as are now in common use. A conductor rod orstem 6 passes centrally through the metal connection 4 and coreB and besides holding said parts together, it carries the current from the lamp socket to The metal connection 5 is fastened to the frame piece :5 by screws 7.

Arranged at the peripheries of the frame pieces 1 and 2 and connecting the same is a head 8 of insulating material which carries a plurality of contact points a, b, e, (Z, e, f, g and h, which project a-suitable distance from the surface of the contact head 8. Disposed around thecore 3 and between the trance pieces or heads 1 and 2, is a series of coils 10, 11, 12, 13, 14, 15 and 16, the said coils being composed of insulated wire. and wrapped one upon and around the other, practically filling the space between the heads 1 and 2, While from said coils lead wires extend to the -'contact points a, b, c, d, e,f,g and h.

Rotatably mounted in the contact head 8 is a rod or shaft 17 having an operating knob 18so that it may be manipulated by hand, and connected fast to said rod or shaft is a contact finger or lever 19 adapted to be moved into contact with any one of the contact points to carry the current between said point and the rod or shaft 17 which is also in the circuit. It .will be understood that the coils 1O, 11, 12', 13, ,14, 15 and'l6 are made up of insulated wire of high electrical resistance and by means of the switch described, any one or more of said resistance coils may be thrown into the circuit and o )posed to the current passing through the amp, thereby reducing to any desired extent the candle power of the lamp. The end of the line wire entering the attachment by which the ourrent is made to pass through the resistance coils, is connected by wire 20 with the first contact point a of the switch and when the contact iinger or lever of the switch rests on said point, the current passes through said finger to the operating rod or shaft 17 which. is connected by wire 21 with the melal connection 5 which carries the current to the lamp. 3 In this position the resistance coils are not in the circuit and the lamp has its full power. By turning the knob 18 so that the contact finger or lever rests on another point the current is caused to pass throughone or more of the resistance coils and on account of the resistance olicred by said coils, the'illuminating power of the lamp will be correspondingly reduced. 22 designates a stop pin to limit the movement of the switch in both directions.

The attachment will ordinarily be inclosed in a suitable casing or covering. By the use of the attachment, which may be applied by any one, a great saving 01' current 15 ellected and any {desired candle power may be ,ob-

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